Man's best friend has gone through many changes.

A look back at how our furry four-legged family members became our friends. — -- In honor of National Dog Day, ABC News looked back at how our furry four-legged companions evolved from feral ...

It might sometimes feel hard to believe when you're looking at a Chihuahua in a cushy dog bed or a golden retriever in a yellow raincoat and boots, but domestic dogs - yes, all domestic dogs - are the ...

New DNA research reveals most pet dogs - yes, even the tiny breeds - still carry faint traces of ancient wolf ancestry.